Feature : Use moshi instead of Gson

**Is your feature request related to a problem? Please describe.**

Currently we use GSON for serializing data.

**Describe the solution you'd like**

Upgrade to Moshi.

**Additional context**

Bench Mark tests
- https://zacsweers.github.io/json-serialization-benchmarking/

SO answer
- https://stackoverflow.com/questions/43577623/moshi-vs-gson-in-android

Blog post I found useful
- https://proandroiddev.com/goodbye-gson-hello-moshi-4e591116231e